cpufreq: intel_pstate: Add Ice Lake server to out-of-band IDs

[ Upstream commit cd23f02f166892603eb9f2d488152b975872b682 ]

Commit fbdc21e9b038 ("cpufreq: intel_pstate: Add Icelake servers
support in no-HWP mode") enabled the use of Intel P-State driver
for Ice Lake servers.

But it doesn't cover the case when OS can't control P-States.

Therefore, for Ice Lake server, if MSR_MISC_PWR_MGMT bits 8 or 18
are enabled, then the Intel P-State driver should exit as OS can't
control P-States.

Fixes: fbdc21e9b038 ("cpufreq: intel_pstate: Add Icelake servers support in no-HWP mode")
Signed-off-by: Adamos Ttofari <attofari@amazon.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 3e56a4a1d1d3a1de071781366d23bd9ea0d82d9e..e15c3bc17a55ce527e511a116ca038c8deea1af2 100644 (file)
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2255,6 +2255,7 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
        X86_MATCH(BROADWELL_D,          core_funcs),
        X86_MATCH(BROADWELL_X,          core_funcs),
        X86_MATCH(SKYLAKE_X,            core_funcs),
+       X86_MATCH(ICELAKE_X,            core_funcs),
        {}
 };